Dowel gluing and driving machine.



E. J. BELL & G. G. DAUBER.

DOWEL GLUING A-ND DRIVING MACHINE.

APPLIOATION FILED 00131, 1912.

1,0'74,1 Patented Sept. 30, 1913.

4 8HEETBSHEET 1.

.W/T/VES'SES. INVENTORS i .7 Cm )3 w A TTOR/VEY cnLuMaIA PLANOGRAPH couwAsl-nNm'n D. c.

B. J. BELL & e. e. DAUBBR.

DOWEL GLUING AND DRIVING MACHINE.

APPLICATION FILED OUT. 31, 1912.

'1,074,1 58, Patented Sept. 30, 1913.

4 sums-serum 2.

Qm m

A TTOR/VE Y COLUMBIA PLANOORAFH (0I WASHINGTON. D. C-

E. J. BELL & G. G. DAUBER.

DOWEL GLUING AND DRIVING MACHINE.

APPLICATION FILED 00131. 1912.

4 SHEETS-SHEET 3.

WITNESSES: I p /w/inlmgs A TTORNEY COLUMBIA PLANDGRAPH CO .WASHINGTON. D. c

E. J. BELL &-G. G. DAUBER.

DOWEL GLUING AND DRIVING MACHINE.

APPLICATION FILED OCT. 31, 1912.

Patented Sept. 30, 1913.

4 SHEETS-SHEET 4.

ATTORNEY WITNESSES COLUMBIA PLANOGRAPH c0., WASHINGTON. D. (:4

UNITE sra'rnsarniwr Fries.

EDV/IN J. BELL AND CHARLES G. DAUBER, OF OSHKOfiI-I, WISCONSIN, ASSIGNORS TO THE DAUBEH-BELL MACHINE COMPANY, OF OSHKOSH, WISCONSIN, A CORPORATION OF WISCONSIN.

DOWEL GLUING AND DRIVING MACHINE.

Specification of Letters latent.

Patented Sept. 36, 1913.

Application filed October 31, 1812. Serial No. 728,868.

States, residing at Oshkosh, in the county of Winnebago and State of Wisconsin, have invented certain new and useful Improvements in Dowel Gluing and Driving Machines, of which the following is a specification.

The invention relates to a new and useful machine for injecting glue and driving dowels.

The object of the invention is to provide a combined machine to inject glue into previously bored dowel holes and immediately thereafter to drive dowels firmly in place in the glued holes.

A further object isto so arrange the parts that dowels may be driven into the work at an angle, such as chair backs, ribs andparts.

A further object is to so arrange the parts that the dowels may be thrown into a holder promiscously and with automaticdevices be straightened out and delivered as required by the driving mechanism. 7

A further object is to provide means to permit of the use of various lengths of dowels and otherwise produce a universal machine adapted to cover the field of dowel setting. i

In the drawings, Figure 1 represents a side view of the machine, Fig. 2 a front elevation, Fig. 3 a side view of the agitating roll, Fig. 4 an end view of same, Fig. 5 a detail of the dowel carrier, Fig. 6 another view of same in a different position, Fig. 7 a detail showing the work rest, Fig. 8 a detail showing the end of the incline grooved plate, Fig. 9 an end view of the glue box showing working of glue pump, Fig. 10 a detail of the pump, Fig. 11 a detail showing the locking means of the lateral adjusting screw, Fig. 12 a view of a seat frame, Fig. 13 a view of table for holding same and Fig. 14 a curved chair back showing position of dowels. I

The machine is constructed of metal with heavy frame having a top 1 and legs 2, bolted or cast together. The work to be acted upon is held on a table whichin this machine is capable of universal adjustment and comprises a frame or bracket 3 secured to the main frame at at, the bracket 3 has slide ways 5 and a slide rest 6 fitted therein, and has the bracket extension 7 forming part thereof, a screw 8 being fitted to move the slide rest up or down. A table 9 is pivoted to the slide rest at 10, screw 11 is fitted through the extending bracket? at 12 and adapted to support the table 9 at the required angle.

Mounted on the table are a pair of work rests l3 and 13, and arranged so they can be secured rigidly to the table at suitable points to support different lengths of work, the rest 13, has the upwardly extending lip 13 to act as an abutment for the end of the work to rest against when receiving the thrust of the dowel drivers. Both the rests 13 and 13 have a cross T slo-t 15 to which is attached a pair of right and left tappets 16 and 16 which are capable of swinging on pivots as shown so that a piece of work may be placed upon the rests and slide against one set of tappets to locate the piece to be acted upon, while the adjacent tappet will swing down below the work without interfering. The other set of tappets are used when the work is reversed, end for end, thereby giving an immediate available stop or side guide for the work, the tappets being normally in the position shown at 16, the object of the tilting table being to permit the use of such work as boards of curved or beveled nature, chair backs and the like.

The dowel driving mechanism comprises one or more horizontally disposed reciproeating plungers 17 attached to a sliding frame 18 and driven by the crank 14 and connecting rod 19. The crank is driven by a gear 20 which meshes into a higher speed gear 21 mounted on the main driving shaft 22, the various shafts being journaled in the frame of the machine in conventional manner.

. For feeding the dowels to a position to be driven we have devised a new departure in the form of a hopper 23 which may be constructed of cast or sheet metal. An incline base of the hopper 24 extends downward as shown in Fig. 1, and has a grooved plate 25 secured to its top face but capable of longitudinal adjustment thereon, the grooves being of required size and distance apart to suit the work required. A roll 26 is fitted into the hopper and arranged to support a portion of the dowels in the hopper, this roll is first formed by milling to leave projecting ribs 27 spaced along its surface and-has the grooves 28 turned to a a hand adj usting suitable depth and spaced apart a distance of less dimension than the diameter of the dowels. A comb like plate 29 with teeth. 30 is secured to the hopper so the teeth extend into the grooves 28 as shown to prevent the dowels from passing around or past the edge of the roll. The roll is fitted on to a shaft 31 with a feather key so it can slide thereon, the shaft being rotated to drive the roll in the direction of the arrow so that by its action the dowels are constantly stirred or agitated in the hopper by means of the ribs 27. A pulley 32 is mounted on the shaft 31 for the transmitting of power thereto. The whole hopper and attached parts are mounted on a grooved plate 33, which plate is in turn mounted on the frame of the machine by means of a dovetail groove or slide way disposed across the frame, the grooved plate having an extending portion 33 which fits the slide way. In this way the whole hopper can be moved along the slide way to a required point and clamped by means of screws in the extending part 33 or by any other convenient means.

The machine shown comprises as part of the invention the use of two complete hoppers, contents and driving mechanism, this being best shown in Fig. 2. The hopper and parts farthest from the pulley may be clamped thereby making the machine suitable for handling such work as the parts of chair seat frames where there are two sets of holes bored in some of the parts. Fig. 12 shows a front partof a common seat frame and in order to drive the dowels simultaneously into all of the holes we provide the two hoppers, the object being to provide means adjustable to the variety of work that may arise, and by the use of the two separate hopper units which include all the driving mechanism, a number of pins can be driven at each end of a rail simultaneously, the rail being laid on the rests 13 reaching from one driving unit to the other. When handling such seat frame parts or like work it is necessary to provide a proper means for holding the work in position while the dowels are being driven.

F or this purpose we move the tilting table over to the center of the machine between the hoppers and mount the special rest 78 on the table 9 using the clamp pieces 79. This work rest has the abutment 80 for the work to rest against and an end gage S1 for setting the work against for end guiding. This work rest can be removed and the rests 13 and, 13 replaced for handling the class of work shown in Fig. 14 when the dowels are driven in the end. The hopper and parts farthest from pulley may be clamped stationary while the other hopper may be moved along the slide way to give varied spacing between the two sets, this movement is accomplished by a screw 34 being fitted into a threaded lugattached to the movable hopper member, The screw has a hand wheel 35 for convenient operating ano a lock nut 36 for locking the screw against rotation when properly'set, which draws the hand wheel and a shoulder on the screw securely against a bearing 37. In this manner any desired spacing can be had conveniently to suit the work. V

Arranged between the incline slide or grooved plate 25 and the driving plungers, is an oscillating-dowel carrier 38 having a segmental form and pivoted to the lower grooved plate at 39, the face 40 being radial and full surface. A hole or series of holes 41 are drilled through the carrier and the outer end chamfered off as shown. A slot or opening 42 is recessed in the plate 33 to permit one edge of the carrier to fit into whereby the holes in the carrier and the grooves in the plate 33 will line axially, the ofiice of the carrier being to tip up in the position shown in Fig. 6 to receive dowels from the grooves in the incline plate and deliver them in a position to be driven, and is actuated by the slide which operates the dowel driving plunger-s, a rail 44 being secured to the slide head 18, a forged fork 45 is fitted.

around the hopper and has its ends pivoted to the carrier at 46. A rod 47 is securedtc the fork 45 and extends back through the rail 44 with an adjusting nut on the end. A tension spring 48 holds the carrier normally in the downward or driving position, but upon the outward travel of the plungers the fork 45 is drawn back causing the carrier to tip up as in Fig. 6. A radial lug 49 is secured to the lower grooved plate and ar ranged to prevent the dowels from passing through the holes in the carrier when in the upward position. A lip 43 is secured to the carrier below the holes and extends outward a short distance to prevent a dowel from becoming cramped and not passeasily into the hole in the carrier, the lip will travel far enough to tip the dowel slightly each stroke so that in case of cramping this would cause it to fall in its place.

A plate 50 is secured to the top of the incline plate 25 and screws 51 fitted so they may be driven down into the grooves to stop off one or more grooves if required. 7

For supplying glue .to the dowel holes,

gluing mechanism is incorporated in the machine and consists of a reservoir 52 having a steam heating jacket 53. A Work support 54 is fitted to the top of the reservoir with guides 55 and in addition, end guides may I be fitted to the support along its top. Glue pumps are arranged within the reservolr and adapted to travel up to reach the work. The

pumps are composed of two cylindrical members 56 and 57. Movable mechanism for raising and lowermg the pumps is provided and composed of a sliding frame 58 fitted in slide ways 59 which are secured to the back of the reservoir. The sliding frame has a beveled cross rail 60 secured thereto on which is attached suitable formed pump brackets 61, these brackets can be positioned at any point along the rail and secured by the set screw 62. The glue pump is secured to the bracket by fitting it into the lower end at 63 and secured therein by a set screw 64, this holds the lower member of the pump rigid with the bracket 61. The upper member of the pump has a nozzle 65 formed therewith or attached thereto with two or more diverging holes 66 diagonally through the tip so the contents of the pump will be forced divergingly from the tip of the nozzle. The body of the outer pump member has a lug 67 formed therewith and another lug 68 is secured to the pump bracket 61 for lug 67 to normally rest against, so the pump members are held from separating. A spring 69 is fitted inside the pump to hold the pump members apart which keeps the lugs 67 and 68 in contact unless the upper pump partis forced downward. A suitable number of inlet holes 70 extend through the body of the pump which permit the pump to fill with glue, the glue being at all times high enough to cover this portion of the pump, these holes immpdiately close when the pump is operated, forcing the contents through the nozzle. A rail 71 is secured to the inside of the reservoir and a lug 72 formed with the upper member of the pump, which at a predetermined point in the stroke of the pump are brought in contact with each other at apredetermined point in the travel of the pump, which holds the upper member of the pump from further travel while the lower member is forcedor telescoped farther into the upper member causing the contents to be forced out through the nozzle, the pumps being operated by afoot pedal 73 which connects with the frame 58 through suitable connections, the upward travel being determined by the adjustment of the set screw 74 which is set to give the pumps the desired stroke, to expel the required amount of glue.

-The entire machine is driven by a pulley 75 with a friction clutch attached, and manually operatedby the pedal 76 through suitable toggles or connections.

In operation, the dowels are thrown at random into the hoppers where they are stirred by the agitating roll until they fall parallel with the grooves in the incline plate and drop therein, resting end to end down the length of the grooves and against the edge of the oscillating carrier 38. This portion of the machine keeps the dowels always in readiness for use. The work to receive dowels is previously drilled or bored, the holes being of suitable size to fit the dowels and the distance apart of the holes to correspond with the center distances of the driving mechanism and of the glue pump nozzles, is placed on the top of the reservoir against a previously adjusted stop and the foot pedal 73 is forced down causing the pumps, as many as necessary, to travel up until the nozzles enter the previously bored dowel holes. The nozzles stop at a point determined by the height of the rail 71 when the lug 72 comes in contact therewith, the lower member of the pump continuing upward until stopped by the screw 7a, which is used to regulate the quantity of glue delivered. Thus the glue contained in the pumps is forced into the dowel holes and distrib uted therein by means of the diverging holes in the nozzles which enables the same results to be attained with less amount of glue than by the old method of forcing the glue centrally against the end of the hole and allowing it to run back, it being always desirable to spread the glue on the sides of the holes. After the holes are glued the work is moved to the driver portion of the machine and set on the table. If the work is of a bevel or circular character the table is tipped to bring the dowel holes axially with the dowel drivers, the work being set against the tappets 16 for side guiding and against the abutment 13 to take the end thrust. The work is now ready to receive the dowels which are driven into the glued holes in the work at the will of the operator and which is accomplished by the pressing of the foot pedal 76 which causes a friction clutch to engage the driving pulley and start the mechanism in ope-ration, agitating the dowels in the hopper so they will drop properly in the grooves of the incline plate 25. The dowels flowing down the incline drop into theholes tl-of the carrier 38 resting on the lug 49 when the carrier is in the uppermost position effected by the lug 44 being brought to engage the rod 4.7 drawing it back to bring the carrier up in the stated position.

As the machine travels on in its cycle the revolving of the crank 14: starts the plungers 17 on their forward stroke, the first fraction of this stroke permits the carrier 38 to drop down to the lowest limit of its travel bring ing the holes therein in axial alinement with the plunger-s 17 the plungers continuing their forward travel reach the dowels in the carrier holes and press them into the holes of the work where they are permanently held by the glue and snug fit. Figs. 5 and 6 better illustrate the action of the carrier in receiving and positioning the dowels to be driven.

The object of the adjustment of the incline grooved plate 25 is for the use of long or short dowels, the plate being moved down nearer the carrier when using short dowels and vice versa for long dowels, as the short dowels would drop in the space between if 1 what we claim and desire to secure by Let ters Patent is 1. In a machine of the class described the combination with a hopper for holding the dowels, a plurality of inclined dowel passages below the hopper, means for causing the dowels to fall into the passages end to end, reciprocating dowel driving plungers horizontally disposed below the hopper, a work support, an oscillating carrier adapted to retain the dowels normally in the passages and adjustably connected to the plungers at a predetermined point of the driving plunger stroke and adapted to receive dowels from the inclined passages and deliver them to a position to be driven into the work.

2. In a machine of the class described the combination with a hopper for holding the dowels, a plurality of inclined dowel passages disposed below the hopper and adjustable longitudinally with relation thereto, means for feeding the dowels into the passages end to end, reciprocating dowel driving plungers horizontally disposed below the hopper, a work support, an oscillating carrier connected with the driving plungers and adapted to normally retain the dowels within the passages, dowel pockets in the carrier for receiving the dowels at a predetermined position thereof and means for adjusting the operative connection between the driving rods and the carrier;

3. In a machine of the class described the combination with a hopper for holding the dowels, an incline plate having dowelpassages therein extending from the hopper, means for feeding the dowels into the passages end to end, reciprocating dowel drivers disposed horizontally below the hopper, an oscillating carrier connected to the dowel drivers and means for adjusting the opera tive relationship therebetween, means for longitudinally adjusting the incline plate toward 01' away fro-1n the carrier, dowel receiving holes through the carrier, a segmentally formed rest positioned within the path of travel of the carrier, openings through the rest adapted to coincide with the holes of the carrier at the lowermost position thereof.

t. In a machine of the class described the combination with a hopper for holding the dowels and having dowel passages extending therefrom, means for feeding the dowels into the passages end to end, dowel driving mechanism adapted to reciprocate horizontally below the hopper, an oscillating carrier adapted to operate between the dowel passages and dowel driving mechanism and having holes theretlirough for the passage of the dowels, a lip extending radially from the carrier adjacent to the holes to prevent the accidental passage of a dowel between the dowel passage and carrier, adjustable operating means between the driving mechanism and the carrier, a segmentally formed dowel rest disposed stationary within the carrier and having holes therebelow to comeide with the holes of the carrier at the lowermost extreme position thereof.

5. In a machine ofthe class described the combination with a dowel containerhaving agitating means disposed therein, dowel passages extending from the container, reoiproeating dowel driving mechanism comprising a sliding crosshead having an upwardly extending lug, driving plungers adj ustably attached to the crosshead, a carrier operative to receive the dowels from the dowel passage and deliver them to a position to be acted upon by the plungers, means for actuating the carrier comprising a pivoted yoke extable, an oscillating dowel'carrier pivoted to the table, adjustable connecting means between the driving plungers and the carriers whereby the timing of their relative movements may be effected.

7 In a machine of the class described the combination with a frame, a grooved table mounted thereon, a dowel containing hopper mounted on the table and having downward extending dowel passages disposed directly above the grooves of the table, dowel driving plungers movable in the grooves of the table, an oscillating carrier pivoted to the table and adapted to receive dowels from the dowel passages and position them axially with the dowel drivers, means for actuating the carrier from the dowel drivers and means for imparting motion to the drivers;

8. In a machine of the class described the combination with a frame having an adjustable work support attached thereto, a grooved table mounted on the frame and having a lateral groove thereacross, a dowel container mounted on the table and having d-ow'el passages extending therefrom, the said passages being positioned above the grooves in the table, means for causing an end to end flow of dowels down the passages, a segment-a1 carrier pivoted to the table and fitted to swing down into thelateral groove, holes through the carrier disposed in a plane with the dowel passages and table grooves, a segmentally formed rest positioned within the carrier andv rigid with the table to close the holes of the carrier in one position thereof, dowel driving mechanism adapted to act in the grooves of the table, means for connecting the carrier with the driving mechanism to cause the two to operate in unison. g

9. In a machine of the class described the combination with a frame having a work holder attached thereto, a grooved table mounted on the frame and having a lateral groove thereacross, a dowel container mounted on the table and having dowel passages extending therefrom, a segmental dowel carrier pivoted to the table and fitted to swing down into the lateral groove, apertures 7 through the carrier disposed in a plane between the dowel passages and grooves in the table a radially extending guard lip formed with the carrier adjacent to the apertures, means stationary with the table for preventing the dowels from passing through the apertures of the carrier when at positions other than when resting in the lateral groove, dowel driving mechanism, means for actuating the carriers from the driving mechanism through the adjustable connections.

10. In a machine of the class described the combination with a frame having a work support attached thereto, a grooved table mounted on the frame, dowel feeding mechanism comprising a holder and dowel passages mounted on the table, dowel driving mechanism comprising reciprocating plungers operative in the grooves of-the table and having actuating means comprising a crank and crosshead, a carrier pivoted to the table and having holes through its face, the said holes being movable in a plane between the dowel passages and table grooves, means for actuating the carriers in one direction from the crosshead through adjustable connections and a spring attached between the carrier and dowel holder for returning the carrier to its lower position.

In testimony whereof we afiix our signatures, in the presence of two witnesses.

EDWIN J. BELL. CHARLES G. DAUBER.

Witnesses:

L. J. MONAHAN, FRANCIS V. MGMANAMY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patentl,

' Washington, 13.0. 

